     string_containschar [:string :boolean :char]
     string_dup [:string]
     string_empty [:boolean :string]
+    string_emptystring [:boolean :string]
     string_eq [:string :boolean]
     string_first [:string :char]
     string_flush [:string]

    string_last [:string :char]
    string_length [:string :integer]
    string_nth [:string :integer :char]
    string_occurencesofchar [:string :integer :char]
    string_parse_to_chars [:string]
    string_pop [:string]
    string_rand [:string :random]

    float_fromstring [:string :float]
    float_gt [:float :boolean]
    float_gte [:float :boolean]
    float_inc [:float]
    float_lt [:float :boolean]
    float_lte [:float :boolean]
    float_max [:float]
